Thanks to her Ye-Ye's epic scavenger hunts, thirteen-year-old Ruby Chu knows San Francisco like the back of her hand. But after his death, she feels lost, and it seems like everyone--from her best friends to her older sister--is abandoning her. After Ruby gets in major trouble at school, her parents decide she has to spend the summer at a local senior center, with her grandmother, Nai-Nai, and Nai-Nai's friends for company. When a new boy from Ruby's...